Fixed-distance spacer at front part of anchor withdrawing device

Abstract

The utility model discloses a fixed-distance spacer at the front part of an anchor withdrawing device, which comprises an anchor withdrawing jack and a spacing structure arranged on one side of the anchor withdrawing jack, and the spacing structure consists of a fixed seat ring and a bent head ejector rod. The fixed seat ring is installed on an annular step at the head of an outer cylinder of the anchor withdrawing jack, the elbow ejector rod is of a structure with the straight back and the bent front, the rear end of a straight rod of the elbow ejector rod is movably connected with a rotating shaft support on the fixed seat ring through a transverse shaft hole, and the elbow ejector rod rotates in the axial plane of the fixed seat ring. The anchor withdrawing jack is pushed to the position close to the anchor cable anchorage device along the steel strand, the elbow ejector rod makes contact with the anchor cable anchorage device, the mechanical spacing distance of 40-50 mm is formed, and space is provided for retraction of the steel strand. And during anchor withdrawing operation, the elbow ejector rod is opened outwards, and the anchor withdrawing head is in contact with the anchor cable anchorage device to finish anchor withdrawing. And after anchor withdrawing is completed, the reset spring enables the elbow ejector rod to return to the initial position. Through the mechanical structure design, the stress of the steel strand is effectively ensured to be completely released.

Description

Technical Field

[0001] This utility model provides a spacer, belonging to the field of coal mine roadway support and anchor removal technology, and particularly relates to a fixed-distance spacer at the front of an anchor removal device. Background Technology

[0002] The background technology of this utility model mainly relates to the unanchoring work of anchor cables and anchorages in coal mine roadways. In the later stages of underground coalfield mining, in order to allow abandoned working roadways to collapse naturally, it is necessary to dismantle the anchor cables and anchorages used for roadway roof support and release the pre-tension stress of the steel strands. Currently, this work is mainly accomplished by unanchoring jacks.

[0003] The working principle of an anchor release jack is to press against the anchor ring and stretch the steel strand, thereby pulling the anchor plate out of the anchor ring and releasing the pre-tension stress of the steel strand. However, in actual operation, because the steel strand will retract when releasing stress, its retraction length is usually greater than its stretching length. Therefore, a certain space needs to be reserved between the anchor release jack and the anchor cable to ensure that the steel strand can fully release stress. However, due to the working habits of front-line coal mine operators, insufficient space is often not reserved, resulting in the pre-tension stress of the steel strand not being fully released when the anchor release jack returns to the bottom. This causes the teeth of the tool anchor to burn during the instantaneous retraction, ultimately leading to the failure of the tool anchor.

[0004] To address this issue, this invention proposes a front-end spacer for the anchor jack. By establishing a mechanical spacer between the head of the anchor jack and the anchor cable, sufficient space is reserved during the anchor removal process, thereby ensuring that the pre-tension stress of the steel strand can be fully released and preventing the tool anchor from being burned. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this application provides a front spacing spacer for the anchor retraction device, which solves the problem of tool anchor erosion failure caused by insufficient space during the anchor retraction process in coal mines, effectively ensuring the complete release of pre-tension stress of steel strands and improving the safety and reliability of anchor retraction operation.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a front spacer for an anchor release device, including an anchor release jack, wherein a spacer structure is provided on one side of the anchor release jack, and the spacer structure includes a fixed seat ring and an elbow rod;

[0007] The fixed seat ring is installed on the circular step on the outer cylinder head of the anchor release jack; the rear end of the straight rod of the elbow jack is movably connected to the fixed seat ring and rotates in the axial plane of the fixed seat ring, and a mechanical gap is formed between the elbow jack and the anchor release jack and the anchor cable anchor.

[0008] Preferably, the elbow rod is a structural member with a straight rear section and a downwardly bent front section at a certain angle, and a transverse shaft hole is provided at the rear end of the straight section.

[0009] Preferably, the fixed seat ring is a circular ring structure, and a rotating shaft support is provided on the side near the spacer structure. The rotating shaft support includes a limiting plate clamping on both sides of the elbow push rod. The limiting plate is provided with a transverse through shaft that passes through itself and corresponds to the elbow push rod. The elbow push rod connects its transverse shaft hole to the transverse through shaft hole of the rotating shaft support through a fixing structure.

[0010] Preferably, the spacer structure further includes a return spring and an elastic retaining ring;

[0011] The reset spring and flat washer are both sleeved on the elbow top rod. The flat washer is located at both ends of the reset spring, and the elastic retaining ring is located at the installation position of the fixed structure and the rotating shaft support. The elastic retaining ring is used to constrain the fixed structure.

[0012] Preferably, the mechanical interval distance is 40-50mm.

[0013] Preferably, the bending angle of the front end of the elbow rod is 10°-30°.

[0014] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0015] This invention involves installing a fixed seat ring on the outer cylinder head of the anchor removal jack and movably connecting it with a bent jack rod. Utilizing the rotational characteristics of the bent jack rod, a mechanical gap is created between the anchor removal jack and the anchor cable / anchor. During the anchor removal operation, the bent jack rod contacts the anchor cable / anchor, automatically maintaining the preset gap and preventing the anchor removal jack from directly pressing against the anchor cable / anchor, thus reserving sufficient space to release the pre-tension stress of the steel strand. This structure effectively solves the problem of tool anchor erosion failure due to insufficient reserved space, ensuring complete stress release of the steel strand and improving the safety and reliability of the anchor removal operation.

[0016] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the ideal usage state of the front spacing spacer of the anchor retraction device according to this utility model;

[0018] Figure 2 This is a schematic diagram of the installation of the spacing structure of part A of the front spacing spacer of the anchor retraction device according to this utility model;

[0019] Figure 3 This is a three-dimensional schematic diagram of the spacing structure of the front spacer of the anchor retraction device according to the present invention;

[0020] Figure 4 This is an exploded view of the spacing structure of the front spacer of the anchor retraction device according to this utility model.

[0021] As shown in the figure:

[0022] 1. Anchor release jack; 2. Interval structure; 3. Fixed seat ring; 4. Elbow jack rod; 5. Fixed structure; 6. Return spring; 7. Elastic retaining ring; 8. Flat washer;

[0023] 21. Rotary shaft support. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] like Figure 1 and Figure 2 As shown, a front-end spacer for an anchor release device includes an anchor release jack 1. The spacer is characterized by a spacer structure 2 on one side of the anchor release jack 1, the spacer structure 2 including a fixed seat ring 3 and a bent-end rod 4. The fixed seat ring 3 is mounted on an annular step on the outer cylinder head of the anchor release jack 1. The rear end of the straight rod of the bent-end rod 4 is movably connected to the fixed seat ring 3 and rotates within the axial plane of the fixed seat ring 3, forming a mechanical spacer distance between the bent-end rod 4, the anchor release jack 1, and the anchor cable / anchor. The bent-end rod 4 is a structural member with a straight rear half and a downwardly bent front half at a certain angle, and its rear end has a transverse shaft hole.

[0028] In this embodiment, the fixed seat ring 3 is installed on the circular step on the outer cylinder head of the anchor removal jack 1, providing stable support and connection foundation for the elbow jack 4, ensuring the robustness of the entire spacer structure 2. The rear end of the straight rod of the elbow jack 4 is movably connected to the fixed seat ring 3 through a transverse shaft hole and rotates in the axial plane of the fixed seat ring 3. This design allows the elbow jack 4 to flexibly adjust its position during the anchor removal operation, ensuring stable and reliable contact with the anchor cable and anchorage. At the same time, the curved design of the front half of the elbow jack 4 allows it to naturally form a mechanical gap when contacting the anchor cable and anchorage, avoiding direct contact between the anchor removal jack 1 and the anchor cable and anchorage, thus effectively solving the problem of tool anchor erosion failure due to insufficient reserved space.

[0029] Furthermore, the design of the bending angle and mechanical spacing of the elbow jack 4 ensures sufficient space for the retraction of the steel strand during the anchor removal process, guaranteeing the complete release of the pre-tension stress in the steel strand and improving the safety and reliability of the anchor removal operation. Through this structural design, this implementation scheme not only simplifies the operation process but also significantly improves the service life and working efficiency of the anchor removal jack.

[0030] like Figure 3 and Figure 4 As shown, the fixed seat ring 3 has a circular structure, and a rotating shaft support 21 is provided on the side near the spacer structure 2. The rotating shaft support 21 includes limiting plates clamping both sides of the elbow push rod 4. The limiting plates are provided with a transverse through-shaft that passes through them and corresponds to the elbow push rod 4. The elbow push rod 4 connects its transverse shaft hole to the transverse through-shaft hole of the rotating shaft support 21 through the fixing structure 5. The spacer structure 2 also includes a return spring 6 and an elastic retaining ring 7.

[0031] The return spring 6 has flat washers 8 at both ends. The return spring 6 and flat washers 8 are both sleeved on the elbow rod 4. The elastic retaining ring 7 is located at the installation position of the fixed structure 5 and the rotating shaft support 21. The elastic retaining ring 7 is used to constrain the fixed structure 5. The mechanical interval distance is 40-50mm and the bending front angle of the elbow rod 4 is 10°-30°.

[0032] In this embodiment, as shown in the figure, the fixed seat ring 3 is a circular ring structure, and a rotating shaft support 21 is provided on the side near the spacer structure 2. The rotating shaft support 21 includes limiting plates clamping both sides of the elbow push rod 4. The limiting plates are provided with transverse through-shafts that pass through themselves and correspond to the elbow push rod 4. The elbow push rod 4 connects its transverse shaft hole to the transverse through-shaft hole of the rotating shaft support 21 through the fixing structure 5. The spacer structure 2 also includes a return spring 6 and an elastic retaining ring 7. Flat washers 8 are provided at both ends of the return spring 6. The return spring 6 and flat washers 8 are both sleeved on the elbow push rod 4. The elastic retaining ring 7 is located at the installation position of the fixing structure 5 and the rotating shaft support 21. The elastic retaining ring 7 is used to constrain the fixing structure 5. The mechanical interval distance is 40-50mm, and the bending front angle of the elbow push rod 4 is 10°-30°.

[0033] In this embodiment, the annular structure of the fixed seat ring 3 allows it to be securely mounted on the annular step on the outer cylinder head of the anchor jack 1, providing a stable support foundation for the entire interval structure 2. The limiting plate design of the rotating shaft support 21 can accurately clamp the elbow jack 4, and through the transverse through-shaft and the transverse shaft hole of the elbow jack 4, it realizes the flexible rotation and positioning function of the elbow jack 4. This structural design not only ensures the stability of the elbow jack 4 during operation, but also effectively adapts to the adjustment needs of different angles.

[0034] The combined design of the return spring 6 and the flat washer 8 provides elastic support and a reset function for the elbow jack 4. During the anchor removal operation, the elbow jack 4 can rotate flexibly when subjected to external force, and after the external force disappears, the return spring 6 can automatically return it to its initial position, ensuring the stability of the mechanical spacing distance. The elastic retaining ring 7 further constrains the fixing structure 5, preventing it from loosening or falling off during operation, thereby improving the reliability and durability of the entire device.

[0035] Furthermore, the mechanical spacing is set at 40-50mm, which effectively ensures the complete release of the pre-tension stress of the steel strand and avoids the problem of tool anchor burning due to insufficient space. The bending front angle of the elbow rod 4 is designed to be 10°-30°, so that it can naturally form a stable support angle when it contacts the anchor cable, further optimizing the efficiency and safety of the anchor removal operation. Through the organic combination of the above structures, this implementation scheme not only effectively solves the problems existing in the prior art, but also significantly improves the convenience and reliability of the anchor removal operation, and has high practical value and promotion significance.

[0036] In use, first install the fixed seat ring 3 on the circular step on the outer cylinder head of the anchor jack 1 to ensure it is firmly fixed. Then, connect the rear end of the straight rod of the elbow jack 4 through its transverse shaft hole to the transverse through shaft hole of the rotating shaft support 21 on the fixed seat ring 3, and use the fixing structure 5 to connect them, so that the elbow jack 4 can rotate freely in the axial plane of the fixed seat ring 3.

[0037] During the anchor removal operation, the operator pushes the anchor removal jack 1 along the direction of the steel strand to the vicinity of the anchor cable anchor until the bent end of the elbow rod 4 contacts the anchor cable anchor. At this time, the elbow rod 4 remains perpendicular to the fixed seat ring 3 under the action of the return spring 6, and a mechanical gap distance of 40-50mm is naturally formed between the anchor removal jack 1 and the anchor cable anchor. This distance provides sufficient space for the retraction of the steel strand, ensuring that its pre-tension stress can be completely released.

[0038] When the anchor-removing jack 1 starts working, the elbow rod 4 opens outward under external force, and the anchor-removing head contacts the anchor cable and anchorage through the elbow rod 4 to complete the anchor-removing operation. After the anchor-removing is completed, the anchor-removing jack 1 returns to its original position, and the steel strand smoothly retracts to a state of zero stress during the release of pre-tension stress. At this time, the return spring 6 automatically returns the elbow rod 4 to its initial position, ready for the next operation. Through this design, this device effectively solves the problem of tool anchor erosion failure caused by insufficient reserved space, and improves the safety and reliability of the anchor-removing operation.

[0039] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A de-anchoring front gauge, comprising a de-anchoring jack (1), characterized in that: The anchor jack (1) has a corresponding partition structure (2) on one side, the partition structure (2) including a fixed seat ring (3) and an elbow rod (4); The fixed seat ring (3) is installed on the circular step on the outer cylinder head of the anchor jack (1); the straight rear end of the elbow rod (4) is movably connected to the fixed seat ring (3) and rotates in the axial plane of the fixed seat ring (3), and a mechanical gap is formed between the elbow rod (4) and the anchor jack (1) and the anchor cable anchor.

2. A front distance spacer for an anchor puller according to claim 1, wherein: The elbow rod (4) is a structural member with a straight rear section and a downward bending angle in the front section, and a transverse shaft hole is provided at the rear end of the straight section.

3. A front distance spacer for an anchor puller according to claim 2, wherein: The fixed seat ring (3) is a circular ring structure. A pivot support (21) is provided on the side near the spacer structure (2). The pivot support (21) includes a limiting plate clamping on both sides of the elbow push rod (4). The limiting plate is provided with a transverse through shaft that passes through itself and corresponds to the elbow push rod (4). The elbow push rod (4) connects its transverse shaft hole to the transverse through shaft hole of the pivot support (21) through the fixing structure (5).

4. A front distance spacer for an anchor puller according to claim 2, wherein: The spacer structure (2) also includes a return spring (6) and an elastic retaining ring (7); The return spring (6) has flat washers (8) at both ends. The return spring (6) and flat washers (8) are both sleeved on the elbow rod (4). The elastic retaining ring (7) is located at the installation position of the fixed structure (5) and the rotating shaft support (21). The elastic retaining ring (7) is used to constrain the fixed structure (5).

5. A front distance spacer for an anchor puller according to claim 1, wherein: The mechanical interval is 40-50mm.

6. A front distance spacer for an anchor puller according to claim 1, wherein: The bending angle of the elbow rod (4) is 10°-30°.

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